Installation. Manual. 07/14 Rev. H

Transcripción

1 Refrigeration Systems Installation Manual

2 Table of Contents Tools Required 3 General Information 4-5 Unpacking & Inspection for Ceiling Mount 4 Unpacking & Inspection for Remote 5 Wall Mount Refrigeration Systems 6-7 Installation Instructions 6 Freezer Models 100 & 150 or Cooler Model General Installation Instructions for Ceiling Mount 8-9 Remote Refrigeration Systems With Electric Vaporizer 10 With Optional Electric Condensate Vaporizer 11 Instructions for Pre-Charged Lines Instructions for Wire Harness 14 Outdoor Systems Membrane Roofing Material Operation Standard Temperature (Cooler) Systems 17 Low Temperature (Freezer) Systems Maintenance Maintenance Analysis 22 2

3 Tools Required Tools required for uncrating and installation of the Refrigeration System Safety Glasses Metal Snips Pry Bar Hammer Adjustable Open End Wrench (2) Drill Driver Pencil 3

4 Refrigeration Systems-General Information Ceiling mounted Refrigeration System General Information This Refrigeration System was produced utilizing the latest in manufacturing technology, the highest quality materials available, along with innovations that make it a distinctive product in its field. Despite rigid controls in the production of the product, there is no substitute for thoroughly reading and UNDERSTANDING the instructions that follow. The result will be an orderly and efficient installation. Please take the time to follow the steps explicitly! Unpacking & Inspection--Ceiling Mount System Check the Delivery Receipt for the number of pieces that made up the shipment and make sure that the number of pallets, boxes or crates agrees with that number. Each piece should be clearly marked with the same five-digit order number that appears on the Delivery Receipt as the shipper's number. Examine the general condition of the shipment and, as soon as unpacking is completed, carefully inspect all parts for possible shipping damage. If damaged parts are discovered, contact the supplier immediately. Delivery Receipt 4

5 Refrigeration Systems-General Information Unpacking & Inspection--Remote Refrigeration Systems Check the Delivery Receipt for the number of pieces that made up the shipment and make sure that the number of pallets, boxes or crates agrees with that number. Each piece should be clearly marked with the same five-digit order number that appears on the Delivery Receipt as the shipper's number. Examine the general condition of the shipment and, as soon as unpacking is completed, carefully inspect all parts for possible shipping damage. If damaged parts are discovered, contact the supplier immediately. It is recommended the condensing unit be elevated from the deck a minimium of 12"-18" to ensure the condenser fan is not drawing or pulling heat reflected off the building roof or pavement in a grade level installation in which the summer heat may exceed 120 F. 5

6 General Installation Instructions WALL MOUNTED REFRIGERATION SYSTEMS Installation Instructions Note: If the system to be wall mounted is a freezer model 100 or 150 or cooler model 075, please see the next section with special instructions on mounting these units. Carefully raise the entire refrigeration system and insert the projecting sleeve of the evaporator section into the opening of the walk-in wall. While supporting the system, lock it into position by turning the locks exactly as you did when locking the walk-in sections together. Make sure that the locks are positively engaged and insert the plug buttons into the lock access holes when finished. Refer to Figure 1. Note: Some motor compressors are openly spring mounted to absorb vibration. Be sure that these bolts are loosened to permit the compressor to float freely on the springs. A reminder label is applied to systems where this procedure applies. Some systems require a permanent connection to an electrical service and a connection at the junction box located within the condensing unit housing. Refer to the serial tag for all pertinent electrical data. These systems must be connected to a power supply disconnect switch and wired according to local and national electric codes. Figure 1. Wall Mounted Refrigeration System No plumbing drain is required, under normal conditions, for indoor installations. A built-in hot gas vaporizer dissipates the condensate moisture automatically. In outdoor installations, the condensate should be plumbed to the nearest drain. Check local building codes. Outside drain lines must also be wrapped with a suitable heater wire if they are ever subjected to below freezing temperatures. Outdoor installations also require the attachment of the rain hood that will divert rainfall from the upper surface of the evaporator housing. See Figure 1 for an illustration. Be sure to allow for sufficient airflow around the condenser. A minimum clearance of six inches is required for installation and a minimum of two feet is required for service consideration. Ambient temperature around the system should be less than 90 F and 50% RH. If multiple units are located in the same area, be sure they do not exhaust hot air flows into one another. In addition to allowing for proper airflow, consideration should be given to the final mounting location of the refrigeration system relative to the customer location to avoid any possible risk of noise impacting the customer experience. Please see the section Instructions for Pre-Charged Lines if the installation of this system involves the use of pre-charged lines to connect the evaporator and condenser sections. 6

7 General Installation Instructions Freezer Models 100 and 150 or Cooler Model After uncrating, before attempting to attach the refrigeration system to the walk-in, a substantial temporary support should be built. The support should be approximately 28 inches high and placed directly below the wall opening of the walk-in. Note: Due to the weight of these systems it is highly recommended that proper lifting equipment, such as a fork truck, be utilized during installation. 2. Lift the refrigeration system onto the temporary support. Determine whether the coil section sleeve is positioned properly so that it can be inserted into the opening without being bent or damaged. Shim the system appropriately so that this can be accomplished. 3. Carefully slide the entire system so that the coil section sleeve enters the opening without disturbing the temporary support below the refrigeration system. Continue until the gasket around the coil section contacts and seals around the entire perimeter of the coil section. Shim the system and adjust it accordingly so that the gasket seal will be uniform on all four sides. 4. Using the section-latching wrench provided for the erection of the walk-in, insert the wrench into the latch access holes of the coil section. Turn each of the locks clockwise until the latches engage the strikes in the walk-in. Turn the lock until a full stop is encountered. DO NOT REMOVE THE TEMPORARY SUPPORT! 5. Remove the louver assembly and drill four 9/16 diameter holes through the two upright angles of the condensing unit section. Drill completely through the walk-in wall and insert the 1/2" threaded nylon rods. Secure with the flat washers and nuts provided. Refer to Figure With the leveling screws threaded completely into the leg support, insert the leg support into the leg retainers at the outer corners of the condensing unit section. Unscrew the leg leveling screws until they contact the floor or other supporting surface. Note: If the supporting surface is extremely uneven, suitable shimming material must be provided under one or both of the leg supports. 7. Attach the diagonal leg support braces using the threaded fasteners provided. Make the final adjustments to the leg leveling screws so that they serve as supporting devices to the outer edge of the refrigeration system. 8. Insert plug buttons into each of the latch access holes. 9. Remove the temporary support assembly that was provided in Step 1. 7

8 General Installation Instructions General Installation Instructions This section has the general instructions for installing the ceiling mounted Refrigeration System. Before proceeding, also see the following section on mounting "Remote Systems with Electric Vaporizer", if applicable. Note: Proper "temporary" interior support must be added during the installation of the refrigeration. Note: Due to the weight of these systems, it is highly recommended that proper lifting equipment, such as a fork lift or scissor lift, be utilized during installation. Also, be sure to allow for sufficient airflow around the condenser. Model numbers ending with the letter "A" require a minimum clearance of two feet for proper unit operation. Model numbers ending with the letter "B" require a minimum of five inches behind the unit and open to the front for proper operation. If multiple units are located in the same area, be sure they do not exhaust hot air into one another. In addition to allowing for proper airflow, consideration should be given to the final mounting location of the refrigeration system relative to the customer location to avoid any possible risk of noise impacting the customer experience. Position the insulated evaporator section of the Refrigeration System over the hole in the walk-in ceiling section. Align the tabs on the side of the insulated evaporator section with the predrilled holes in the ceiling section. Before proceeding to the next step, the evaporator cover should be removed. Look inside the evaporator section and be sure the air divider in the ceiling section lines up with the black gasket divider in the evaporator section. Some adjustment may be required by simply bending the ceiling section divider slightly forward or backward. This will prevent any short cycling of discharge and return air. Fasten the insulated evaporator section down to the ceiling using the provided drive screws, which can be found attached to the side of the refrigeration system. CAUTION! This must be done to prevent the entire refrigeration system from moving during operation. Note: On smaller refrigeration systems, you may elect to install the system on the ceiling section while the section is still on the floor. CAUTION! Make sure to fasten down the system to the ceiling panel. The ceiling section and the refrigeration system may then be erected together in the normal sequence of assembly as shown in the Kold Locker Walk-in Installation Instructions. This method is not practical and should not be used with larger systems of 100 series or above, such as a 100, 150 or 151 model. 8

9 General Installation Instructions Note: The process above is the same when locating/installing the insulated evaporator section of a Remote Refrigeration System. After the system is in place, make sure that the bolts fastening the condensing unit section to the evaporator section are loose enough so that the two sections can adjust to the ceiling surfaces. Note: On large systems, 100 series and above, the units are placed on a rack assembly and do not have these bolts connecting the two sections together. No adjustment is necessary. Note: Some motor compressors are openly spring mounted to absorb vibration. Be sure that these bolts are loosened to permit the compressor to float freely on the springs. A reminder label is applied to systems where this procedure applies. Some systems require a permanent connection to an electrical service and a connection at the junction box located within the condensing unit housing. Refer to the serial tag for all pertinent electrical data. These systems must be connected to a power supply disconnect switch and wired according to local and national electric codes. No plumbing drain is required, under normal conditions, since the condensate moisture is dissipated automatically by a built-in hot gas vaporizer. 9

10 Remote Refrigeration Systems Remote Systems with Electric Vaporizer Set the Refrigeration System evaporator section over the hole in the ceiling section. Align the tabs on the side of the insulated evaporator section with the predrilled holes in the ceiling section. Before proceeding to the next step, the evaporator cover should be removed. Look inside the evaporator section and be sure the air divider in the ceiling section lines up with the black gasket divider in the evaporator section. Some adjustment may be required by simply bending the ceiling section divider slightly forward or backward. This will prevent any short cycling of discharge and return air. Fasten the evaporator section down to the ceiling using the provided drive screws, which can be found taped to the side of the insulated evaporator section. CAUTION! This must be done to prevent the entire refrigeration system from moving during operation. 10

11 Remote Refrigeration Systems Optional Feature - Electric Condensate Vaporizer Note the location of the condensate drain line coming from the evaporator. Locate the electric vaporizer so the condensate will run into it. If the vaporizer cannot be located at the drain line, use the supplied plastic tubing, copper elbow, and hose clamp(s) as required to extend the drain line. Cut the plastic tubing to length as required. Provide power to the electric vaporizer per local and national electric codes. 11

12 Remote Refrigeration Systems INSTRUCTIONS FOR PRE-CHARGED LINES - REMOTE SYSTEMS By employing self-sealing refrigeration couplings, the condensing unit section, evaporator section, and the connecting tubing are separately pre-charged with refrigerant and leak tested at the factory before shipment. Follow steps 1-8 below to install the connecting tubing at both the condensing unit and the evaporator section. 1. Carefully uncoil the suction line. This is the line covered with a continuous length of sponge rubber insulation. 2. Carefully uncoil the liquid line. The liquid line is the smaller diameter, bare copper tube. 3. Before making any connections, determine the routing of both lines and carefully hand bend them to suit the situation. Keep any bend radius rather large to prevent kinking the tubing. It is a general practice to route the suction and liquid line parallel and close together in the installation. 4. Remove the dust caps and plugs from the couplings and inspect them to see if the synthetic seals are intact. 5. Using a clean cloth, wipe the coupling seals and threaded surfaces to prevent the inclusion of any dirt or foreign material in the system. 6. LUBRICATE the synthetic seal in the male half of the couplings with refrigeration oil and thread the two coupling halves together BY HAND to ensure proper mating of the threads. Note: Make certain that the insulated suction line is connected to the coupling half marked "Suction Line" and that the bare tube liquid line is connected to the coupling half marked "Liquid Line". Note: Always use two wrenches on the coupling body hex nut and on the union to prevent twisting of the tube while tightening the connections as described in the next step. 7. Using the proper size wrench on the union nut, tighten until the coupling bodies bottom, or until a definite resistance is felt. Tighten an additional 1/6 to 1/4 turn. This final turn is necessary to ensure the knife edge metal seal bites into the brass seat of the coupling halves, forming a leak proof joint. Connecting to the Condensing Unit Side 12

13 Remote Refrigeration Systems 8. Once the suction line is connected, the sponge insulation must be pulled up to cover the quick connects. Tie or tape off the insulation to prevent air infiltration and reduce water/ice formation on the suction line. All valves are open and the system is ready for operation. Remember, the refrigeration couplings on this system are self sealing and, if the need ever arises, the couplings may be disconnected without any loss of refrigerant. IMPORTANT: Since this system is equipped with pre-charged refrigerant lines, it is the installing contractor s responsibility to ensure that the quick connect refrigerant couplings are properly mated and are leak free. It is also their responsibility upon start-up to check the system for proper operation and make any necessary temperature control or thermal expansion valve adjustments. Note: A drain line is required to be run by the contractor for this type of installation. CAUTION: Line set must not exceed 3 feet longer than required length to complete connection or improper oil return may result in compressor failure. Contact the Service Department with model and serial number for further assistance.this information is also included on a tag attached to the line set. Some systems require a permanent connection to an electrical service and a connection at the junction box located within the condensing unit housing. Refer to the serial tag for all pertinent electrical data. These systems must be connected to a power supply disconnect switch and wired according to local and national electric codes. Connecting to the Evaporator Section Side 13

14 Remote Refrigeration Systems with Wire Harness 1. All systems with a wire harness will have a K at or near the end of the model number. Example: RCPB100DC-A-50K. 2. These systems will come with the wire harness already wired to the condensing unit section of the refrigeration system. 3. These wire harnesses will have approved seal tight conduit and connectors. 4. Before power is connected to the condensing unit section it should first be wired to the evaporator section with the wire harness provided. 5. Remove the control box cover on the evaporator section. 6. Make the proper connections inside the control box on the evaporator section as shown in the wiring diagram provided with the system. 7. Replace the cover on the control box when wiring is completed. 8. Now power can be brought to the condensing unit section of the refrigeration system. 14

15 Outdoor Systems Outdoor Systems Utilizing a Membrane Roofing Material 1. After the walk-in is completely assembled, place the curb face down on top of the ceiling sections (curb is fastened to crate base during shipping and must be removed and installed prior to membrance roof installation). To ensure proper opening alignment, mark the outside portion of the curb on the ceiling sections with a marking pencil. Curb Alignment Marks Ceiling Sections 2. Remove the paper from the gasket and position the curb, gasket side down, on the pencil line. Press down firmly. Note: Movement of the curb is very difficult after the gasket adheres to the ceiling section. Refer to Figure 1. Walk-In Figure 1 Cutout Line Fasten to Edge of Curb Frame Membrane Roofing Opening 3. Lay the membrane roofing material over the walk-in ceiling sections and curb leaving a six inch overhang on all four sides of the walk-in. Using an utility knife, cut a hole in the membrane roof approximately 1-1/2 in from the edge of the opening. (The resulting hole in the membrane will be smaller than the ceiling opening). Fold the 1-1/2 membrane flaps into the opening, notching the membrane around the locators and divider. Use either sheet metal screws, caulk, glue, etc. to fasten the membrane roofing material to the inside edge of the curb frame. Refer to Figure 2. Walk-In Figure 2 15

16 Outdoor Systems 4. Set the Refrigeration System over the opening in the curb. Remove the enclosure from the condensing unit portion of the system and drill two 9/16 holes through the condensing unit base plate, membrane roof material and the foamed ceiling section. The holes should be located on opposite sides of the unit. Insert one 1/2 threaded nylon rod into each hole. Apply silicone sealant around each nylon rod and hole and place one washer and nut on the condensing unit end of each threaded nylon rod. Place a second washer and nut on the inside of the walk-in and tighten securely. Replace the enclosure and attach the outdoor hood with the drive screws provided. Refer to Figure 3. The nylon rods, washers, and nuts are provided. Note: Seal gasket at top of curb with silicone. 5. Fold all four corners of the membrane roofing material over the walk-in corners as shown in Figure 4. Figure 3 Opening Walk-In Capsule Pak With Hood Membrane Roofing 6. Attach the trim and door hood by using the provided hex head sheet metal screws. All pieces should be held down 3-1/8 from the ceiling top as shown in Figure 5. Ensure the trim and membrane roof material cover the joint between the ceiling and wall panels. Note: The trim may have to be cut to fit. Membrane Roofing Material Fold Membrane Figure 4 7. Trim off all excess membrane roofing material from under the terminatin bar with a utility knife. Do not allow the knife to cut the metal panel, as this will damage the coating and cause rust. Note: In outdoor installations, the condensate should be plumbed to the nearest drain. Check local building codes. Outside drain lines must also be wrapped with a suitable heater wire if they are ever subjected to below freezing temperatures. Figure 5 16

17 Operation OPERATION STANDARD TEMPERATURE (COOLER) SYSTEMS The automatic air defrost Capsule Pak Refrigeration System for coolers is a basic, unitized refrigeration system. The system is designed to provide normal storage temperatures in a Kold Locker Walk-in with a minimum of effort during initial installation. The system consists of a complete condensing unit, an evaporator coil, a method for controlling the temperature, and a time switch for setting "off cycle" defrost. Important: It is the installing contractor s responsibility to check the operation upon start-up and make necessary temperature control or thermal expansion valve adjustments as required for proper operation. Note: Capsule Pak Refrigeration Systems that are designed for outdoor installation will be fitted with electric crankcase heaters, electrically heated condensate drain tubes, automatic head pressure control valve, and the "pump-down cycle". Refrigeration Controller Capsule Pak refrigeration systems may be equipped with either a conventional temperature thermostat or an electronic programmable temperature control. See page 19 for the operation of a conventional control or see separate instructions on the operation of the electronic temperature control. Defrost Cycle (Cooler System) The purpose of the defrost cycle is to allow time for any frost formed on the evaporator to melt and clear from the surface. The time clock stops the condensing unit. During this time, the evaporator fans continue to run, blowing F air over the fins. This process will warm the evaporator above +32 F. After 15 minutes, the condensing unit should restart. Note: Some models may have a programmable controller used in place of the Time Clock. This unit is used to control the time and duration of the defrost. Please see the separate instructions that are included for the operation of this control. Time Clock The time clock used to control the defrost cycle has been factory preset. However, please refer to the following instructions on the operation of the time clock if an adjustment is ever needed. Note: The cooler time clock is factory set for a 15 minute defrost every 3 hours. Time Clock Adjustment The 24-hour dial has quarter-hour divisions and AM/PM indications. The time switch is set by pushing the captive trippers to the outer ring position for the entire period that the load is to be turned "on", i.e. fifteen minutes for each tripper on the 24-hour dial. When the tripper is pushed to the inside, the switch is in the "off" position. (It is not recommended for the cooler to have defrosts longer than 15 minutes.) 17

18 Operation LOW TEMPERATURE (FREEZER) SYSTEMS The low temperature, automatic electric defrost Capsule Pak Refrigeration System is the most dependable and readily understood equipment available. It employs a basic refrigeration system with electric elements to provide heat for defrosting. Important: It is the installing contractor s responsibility to check the operation upon start-up and make necessary temperature control or thermal expansion valve adjustments as required for proper operation. Note: Capsule Pak Refrigeration Systems that are designed for outdoor installation will be fitted with electric crankcase heaters, electrically heated condensate drain tubes, automatic head pressure control valve, and the "pump-down cycle". Defrost Cycle Under low temperature conditions, the air being forced through the evaporator coil is well below freezing at all times, even during each compressor "off" cycle. Therefore, a source of heat must be supplied to melt the accumulated frost. To achieve a complete defrost, electric heater elements are attached to the evaporator coil and to the drain pan. An electric time switch initiates a predetermined number of regular defrost periods per day. When a defrost period occurs, the time switch stops the evaporator fan(s) and the condensing unit, and energizes the electric heaters in the evaporator coil and in the drain pan beneath it. Note: Some models may have a programmable control used in place of the time switch. This unit is used to control the temperature and the defrost settings. Please see the separate instructions that are included on the operation of this control. Defrost Cycle Termination As the defrost cycle progresses and the frost accumulation melts from the fins of the evaporator coil, the temperature of the finned surfaces of the evaporator coil will rise proportionately with the removal of the frost. When this temperature reaches about 50 F, a point where the evaporator coil should be completely free of frost, a defrost termination thermostat attached to the evaporator coil will energize a solenoid coil in the defrost time switch which will revert the system to the cooling cycle. The fan(s) in the evaporator housing will not start, however, until the fan delay cycle has expired. See the "Fan Delay" below. Fan Delay When a defrost cycle is terminated through the action of the defrost termination thermostat as described in the section "Defrost Cycle Termination", the electric defrost heaters are de-energized, the compressor starts, and evaporation resumes in the coil. The evaporator fan(s), however, will not start until the evaporator coil temperature is reduced to about +20 F. Once this temperature is reached, the fan delay switch action of the defrost termination thermostat energizes the evaporator fan(s) and they begin operating. The fan delay feature is an important part of defrosting. If the fan(s) was permitted to start immediately following a defrost period, the heat that accumulated in the evaporator housing would be circulated throughout the walk-in, raising the temperature considerably. In addition, any droplets of moisture that remained clinging to the fins of the evaporator coil would be blown into the storage space. The fan delay feature provides for a short refrigeration cycle WITHOUT the evaporator fan(s) to prevent these conditions. Note: During the initial startup of a Capsule Pak Refrigeration System on warm Kold Locker Walk-in, the evaporator fan(s) will not start until the evaporator coil reaches and maintains +20 F. Further, the evaporator fans may cycle "on" and "off" several times until the evaporator coil reaches and maintains +20 F. 18

19 Operation Time Clock Adjustments: Setting the correct time of day: Simply rotate the minute hand clockwise until the correct time of day on the outer dial is aligned with the triangle marker on the inner dial. In referring to the illustration, the correct time of day shown is 8:00 a.m. Number of defrosts per day: The time switch is factory set to provide four defrosts per day. If more defrosts are required, move additional white tabs at the desired time. No more than two consecutive tabs should be set at any one time. Each white tab constitutes 15 minutes of defrost time. If the four defrost periods provided are more than necessary, push white tabs back toward the center of the dial. Fail-Safe feature: The fail-safe of the timer is factory set at 30 minutes. The function of this device is to terminate the defrost cycle and revert back to the cooling cycle if a system malfunction occurs during defrost. No adjustment of this device should ever be necessary. Lengthening the fail-safe time will not lengthen the defrost cycle. Note: The defrost times are factory set at 10:00 a.m., 4:00 p.m., 10:00 p.m., and 4:00 a.m. This setting will provide adequate defrosting for a normal installation. Refrigeration Controller Some Capsule Pak Refrigeration Systems are equipped with conventional temperature thermostats that sense the "cut-in" and "cut-out" temperatures of the return air to the evaporator coil. These thermostats are adjustable and require a turn of the dial to change the interior storage temperature. Note: The control can be reached through the interior louver for adjustment, with a 6 long shaft flat blade screwdriver. Make adjustments in small increments until the desired temperature is reached. Indoor Capsule Pak Refrigeration Systems may be equipped with either a conventional temperature thermostat or an electronic programmable temperature control. See separate instructions on the operation of the electronic temperature control. All outdoor Capsule Pak Refrigeration Systems and some indoor systems employ a "pump-down cycle" which permits the compressor to pump most of the refrigerant from the evaporator into its receiver after each "on" cycle. In this application, the refrigeration controller regulates the operation of a solenoid valve in the liquid line. A low-pressure control is installed in the low side of the system that shuts down the compressor due to low pressure, which results when the solenoid valve closes the liquid line. The temperature thermostat is adjustable and requires a turn of the dial to change the interior storage temperature. 19

20 Operation/Maintenance Drain Tube Heater Low temperature ceiling mounted Capsule Pak Refrigeration Systems may employ a low wattage, electric heater strip. This heater is spirally wound around the condensate drain tube that extends from the drain pan below the evaporator coil to the evaporator section housing wall. This heater is energized continually to provide positive discharge of the condensate moisture to the hot gas vaporizer. The heater and drain tube are covered with an insulated tape. MAINTENANCE WARNING: When servicing any Capsule Pak Refrigeration System or performing any maintenance procedure, always disconnect the main power supply. The condensing unit, condensate vaporizer, and the control box on low temperature models are all accessible by removing the grills or louvers on the condensing unit housing. The evaporator coil section is accessible by unlatching and removing the evaporator section housing cover. For access to the fan blade(s) and for oiling the fan motor on some models, remove the louver on the walk-in ceiling. Cleaning the Condenser The efficiency of the condensing unit, to a great extent, depends upon the unrestricted flow of air through the condenser. For this reason, the condensing unit should be as clean as possible at all times and should always have an unrestricted supply of air. Cleaning the condenser should be done at a minimum of every 3 months. A wire brush should be used to loosen the accumulation of dust and dirt particles that have attached to the fins of the condenser. Once this accomplished, a vacuum cleaner can be used to remove the loosened particles. If compressed air is used to clean the condenser, the air should be directed through the condenser from the fan motor side. Wipe away any accumulated dust from the compressor motor and related parts. 20